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pentagon [3]
3 years ago
13

To the nearest square metre, calculate the curved surface area of the half pipe if it is 9m long? (With a radius of 2.5m)

Mathematics
1 answer:
Mice21 [21]3 years ago
4 0

Answer:

70.686 m^{2}

Step-by-step explanation:

A=2πrh (area of cylinder without top or bottom)

A = 2\pi(2.5)(9)

A = 141.372

divide by two for half of pipe.

A = 70.686

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Plz solve the following with steps (people who just come by without answering the question and taking the points may end up as b
sleet_krkn [62]

Answer:

<h2>12) There are 534 students who do not lunch in school.</h2>

Step-by-step explanation:

<h3>12. </h3><h3>Simple solution: </h3><h3>890 ÷ 5 = 178 </h3><h3>Therefore: 1/5 = 178 </h3><h3 /><h3>•To find the 2/5 of the students, we have to multiply 178 by 2</h3><h3>178 × 2 = 356</h3><h3>Therefore, 356 students stay to have lunch.</h3><h3 /><h3>•To find the remaining students who do not lunch in school, we have to subtract 356 to 890.</h3><h3>890 - 356 = 534</h3><h3>Therefore, there are 534 students who do not lunch in school.</h3><h3 /><h3 />
8 0
3 years ago
What are the possible values of x if (4x - 5)2 = 49? Check all that apply.<br> uw we we
kogti [31]

Answer:

x = - \frac{1}{2}, x = 3

Step-by-step explanation:

Given

(4x - 5)² = 49 ( take the square root of both sides )

4x - 5 = ± \sqrt{49} = ± 7 ( add 5 to both sides )

4x = 5 ± 7, thus

4x = 5 - 7 = - 2 ( divide both sides by 4 )

x = \frac{-2}{4} = - \frac{1}{2}

or

4x = 5 + 7 = 12 ( divide both sides by 4 )

x = 3

As a check

Substitute these values into the left side of the equation and if equal to the right side then they are the solutions.

x = - \frac{1}{2}

left side = (- 2 - 5)² = (- 7)² = 49 = right side ⇒ solution

x = 3

left side = (12 - 5)² = 7² = 49 = right side ⇒ solution

7 0
3 years ago
Plz help idk what this is even about
AysviL [449]

I think the answer is A.

It's probably wanting you to use pythagorean theorem.

6 0
4 years ago
Find the gradients of lines A and B.
kherson [118]
Hey, you didn’t provide any picture or further context.

To solve for gradient, do (y2-y1)/(x2-x1)
So what do you think?
5 0
3 years ago
At a restaurant jars of tomato sauce are stored in boxes in the pantry. Each box contains 8 jars of tomato sauce. A cook uses 2
defon

Answer:

y = 8x − 2

Step-by-step explanation:

x =the number of boxes

Total jars of tomato sauce is each box contains 8 jars so that is 8 x x=8x

2 jars were removed making it 8x-2

y will be 8x-2

3 0
3 years ago
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